There are many different types of objects, liquids and substances that glow when exposed to black light. Generally, these liquids have molecules with rigid structures and delocalized electrons because these properties usually lend themselves to the reaction of glowing under a black light. Some examples of liquids that glow under a black light are petroleum jelly, tonic water, water with vitamins in it, antifreeze and even some bodily fluids.Know More
When fluorescent substances are exposed to a black light, they glow. This is because they absorb the ultraviolet light that emits from the black light device and re-emit it. A slight modification in energy occurs, however, which makes the emitted light visible to the human eye. Because of this effect, certain substances appear to glow. Some animals even glow under a black light.
Other types of liquids that glow under a black light include chlorophyll, laundry detergent and some types of cleaners. Tooth whiteners also often glow under a black light. Because these materials are composed of different things, but have a similar effect on the energy they absorb from the black light, they do not all glow in precisely the same way. In fact, many substances glow in different colors from one another when exposed to a black light.Learn more about Lighting
To make water glow, tonic water, a black light, two clear plastic cups, a medicine dropper and some bleach are needed. While the black light makes tonic water glow, adding bleach to it reduces the glow.Full Answer >
An incandescent light bulb is made out of glass and metal. It is filled with an inert gas such as argon. This gas helps to slow down the deterioration of the metal filament.Full Answer >
A light bulb is non-ohmic because it does not obey Ohm’s law. According to Ohm's law, "The ratio of potential difference to the current flowing through a conductor is constant, providing all other influences such as temperature are kept constant."Full Answer >
Sources of light are things or devices that produce light, and the two general sources are natural and artificial. The sun is Earth’s main source of natural light that releases its energy as heat and light. This light is known as white light, and it is what gives Earth daylight. Other forms of natural light include other stars, the moon, lightning, aurorae and noctilucent clouds.Full Answer >